Truck 10 bolt in an Fbody (yes we can)
02-12-2017, 04:32 PM
#102
02-12-2017, 04:38 PM
#103
Older cars had low hp but loads of torque. My 496 BB Chevelle SS with a turbo350 trans use to spit out ten bolt's fast. The 12 bolt(3:90 wearing street M&H's) rebuilt with hardened thicker clutch plates and twice the spring pressure was like manna from heaven. It got me over 20 years of abuse with 7000 rpm shift points and a pound of time slips in two states. Sold the beast still purring. 
On the flip side, I helped my brother in law build his 68 Camaro. M4, 355, Heads, Cam, Intake. Puts down about 420 motor. Not crazy. Not heavy. Has a mildly built 8.5 that has lasted through several motors and years of abuse. But it's a light-ish car on BFGoodrich 275 street tires. Rear has zero issues. (Munches pull out trannies though)
It all depends on what you realistically plan to do.
02-12-2017, 06:08 PM
#104
Launching!
Thread Starter
Join Date: Sep 2007
Location: Surrey, BC
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
Loads of clearance from the tractor quality mount to the tank. Not a worry there. I had some thoughts on “re-drilling” the axle flanges for a 5 bolt pattern... But we aren't exactly precision machinists.
I've got an m6 and I've killed 2 7.5s. Posi welded its self in the first one and I twisted axles in the second, both on street tires. Steve completely grenaded the 10 bold in his auto... On the street. Both at the 400ish hp level at the time.
The offset is mainly a wheel issue. Those steelies don't have the right offset/backspace at all. A set of weld draglites (or something affordable) with a bit more backspace will look “cleaner”. Also I'm just holding the wheel on the studs with my foot in the photo. If Steve can get the shovel out and get a proper photo it'll probably look better.
I'm all for a “proper” solution. My car has a fab9 and I spent infinity billion Canadian pesos on it. About as much as the rest of my build combined. But that's not what Steve's camaro is about.
In fact the reason I went fab9 was because I read all the 12 bolt vs s60 vs fab9 threads where curmudgeonly internet ***** beat a dead horse into a paste for their own gratification. We made this as much of a “**** you” to these people as we did “because money is expensive”. So there's that...
I've got an m6 and I've killed 2 7.5s. Posi welded its self in the first one and I twisted axles in the second, both on street tires. Steve completely grenaded the 10 bold in his auto... On the street. Both at the 400ish hp level at the time.
The offset is mainly a wheel issue. Those steelies don't have the right offset/backspace at all. A set of weld draglites (or something affordable) with a bit more backspace will look “cleaner”. Also I'm just holding the wheel on the studs with my foot in the photo. If Steve can get the shovel out and get a proper photo it'll probably look better.
I'm all for a “proper” solution. My car has a fab9 and I spent infinity billion Canadian pesos on it. About as much as the rest of my build combined. But that's not what Steve's camaro is about.
In fact the reason I went fab9 was because I read all the 12 bolt vs s60 vs fab9 threads where curmudgeonly internet ***** beat a dead horse into a paste for their own gratification. We made this as much of a “**** you” to these people as we did “because money is expensive”. So there's that...
02-12-2017, 06:18 PM
#105
Older cars had low hp but loads of torque. My 496 BB Chevelle SS with a turbo350 trans use to spit out ten bolt's fast. The 12 bolt(3:90 wearing street M&H's) rebuilt with hardened thicker clutch plates and twice the spring pressure was like manna from heaven. It got me over 20 years of abuse with 7000 rpm shift points and a pound of time slips in two states. Sold the beast still purring.
I am not an expert on them but I recall the 8.5 corporate could also be broken down by 2 versions c clip and bolt in axle and the bolt in was known to be "arguably" as durable as a 12 bolt in drag racing. I am making an assumption here that the 10 bolts you broke were bolt in 8.2's vs the later corporate rear.
02-12-2017, 06:23 PM
#106
Launching!
Thread Starter
Join Date: Sep 2007
Location: Surrey, BC
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
Oh. Also the axle tubes have a larger diameter on the 8.5 than on the 7.5. Half inch I think. So you can't just swap tubes.
As far as weight goes I'm a decent sized guy and Steve is a giant. Neither of us were comfortable with the 8.5 As a one man lift. The 7.5 was “acceptable” his words.
As far as weight goes I'm a decent sized guy and Steve is a giant. Neither of us were comfortable with the 8.5 As a one man lift. The 7.5 was “acceptable” his words.
02-12-2017, 06:25 PM
#107
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,038
Likes: 0
Received 1,488 Likes
on
1,071 Posts
Big car, big motor, sticky tires........... yeah, I have no doubt that you ate 8.5's. But food for thought, think about how high you need to rev a LS1 with good tires to get a good launch - talking about an M6. You need a six grand clutch dump not to bog. What would happen if you launched your car with a 4-speed at 6 grand, lol. You're absolutely right.
On the flip side, I helped my brother in law build his 68 Camaro. M4, 355, Heads, Cam, Intake. Puts down about 420 motor. Not crazy. Not heavy. Has a mildly built 8.5 that has lasted through several motors and years of abuse. But it's a light-ish car on BFGoodrich 275 street tires. Rear has zero issues. (Munches pull out trannies though)
It all depends on what you realistically plan to do.
On the flip side, I helped my brother in law build his 68 Camaro. M4, 355, Heads, Cam, Intake. Puts down about 420 motor. Not crazy. Not heavy. Has a mildly built 8.5 that has lasted through several motors and years of abuse. But it's a light-ish car on BFGoodrich 275 street tires. Rear has zero issues. (Munches pull out trannies though)
It all depends on what you realistically plan to do.
it sounds like you have been around the block a few times and likely know this but just to be sure chevelle 10 bolts were on the weak side 8.2 " with c clips vs the 2nd gen f body and 73 & later chevelle rear end that also went in a lot of trucks as mentioned here and probably most well known for running down into single digits behind turbo buicks the 8.5 "corporate" rear end that replaced both the 10 bolt (8.2) and the 12 bolt with one rear end.
02-12-2017, 06:32 PM
#109
I think a lot of it between the big 10 bolts is luck. I use to hang around New England Dragway when I had my GN. After the GN's and turbo T/A's came out we kind of took over the track on cold days. Most of the rears held up fine getting to the 11's. Like anything else sometimes one wouldn't make it home....My corporate lived till stolen. 5 yrs(high 12's)
Last edited by handyandy496; 02-12-2017 at 06:46 PM.
02-12-2017, 07:31 PM
#112
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,038
Likes: 0
Received 1,488 Likes
on
1,071 Posts
02-12-2017, 07:56 PM
#116
Nope. But we were discussing the feasibility of swapping in an 8.5 before everyone decided to start talking about other rears. It's completely useless info for this thread. One more time for you slow people.
We don't care about your 9" or s60 in this thread.
We don't care about your 9" or s60 in this thread.
02-13-2017, 02:57 AM
#119
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,038
Likes: 0
Received 1,488 Likes
on
1,071 Posts
I'm curious, what sort of vehicles are these coming from for $65-$150? Are they all from trucks at that price? And are they posi? 8.5" was used for many different platforms, ones that are direct bolt-in for popular performance applications are usually much more expensive in my experience.
02-13-2017, 07:04 AM
#120
Launching!
Thread Starter
Join Date: Sep 2007
Location: Surrey, BC
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
I think it was 140 Canadian pesos out of a truck. 3.73 ratio with a posi. A couple tractor quality heim joints for the torq arm and 2 cases of beer. We prob came in around 200 pesos.